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<a class="jxr_linenumber" name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment"> * To change this template, choose Tools | Templates</em>
<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> * and open the template in the editor.</em>
<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="5" href="#5">5</a>   <strong class="jxr_keyword">package</strong> com.googlecode.npuzzle.logic;
<a class="jxr_linenumber" name="6" href="#6">6</a>   
<a class="jxr_linenumber" name="7" href="#7">7</a>   <strong class="jxr_keyword">import</strong> java.util.Arrays;
<a class="jxr_linenumber" name="8" href="#8">8</a>   
<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_javadoccomment"> * @author thiago</em>
<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="13" href="#13">13</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../com/googlecode/npuzzle/logic/EigthPuzzleState.html">EigthPuzzleState</a> <strong class="jxr_keyword">extends</strong> <a href="../../../../com/googlecode/npuzzle/logic/BasePuzzleState.html">BasePuzzleState</a> {
<a class="jxr_linenumber" name="14" href="#14">14</a>  
<a class="jxr_linenumber" name="15" href="#15">15</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../com/googlecode/npuzzle/logic/EigthPuzzleState.html">EigthPuzzleState</a>() {
<a class="jxr_linenumber" name="16" href="#16">16</a>          <strong class="jxr_keyword">super</strong>(9);
<a class="jxr_linenumber" name="17" href="#17">17</a>      }
<a class="jxr_linenumber" name="18" href="#18">18</a>  
<a class="jxr_linenumber" name="19" href="#19">19</a>      @Override
<a class="jxr_linenumber" name="20" href="#20">20</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> moveUp(<strong class="jxr_keyword">int</strong> pos) {
<a class="jxr_linenumber" name="21" href="#21">21</a>          move(pos, pos - 3);
<a class="jxr_linenumber" name="22" href="#22">22</a>      }
<a class="jxr_linenumber" name="23" href="#23">23</a>  
<a class="jxr_linenumber" name="24" href="#24">24</a>      @Override
<a class="jxr_linenumber" name="25" href="#25">25</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> moveDown(<strong class="jxr_keyword">int</strong> pos) {
<a class="jxr_linenumber" name="26" href="#26">26</a>          move(pos, pos + 3);
<a class="jxr_linenumber" name="27" href="#27">27</a>      }
<a class="jxr_linenumber" name="28" href="#28">28</a>  
<a class="jxr_linenumber" name="29" href="#29">29</a>      @Override
<a class="jxr_linenumber" name="30" href="#30">30</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> moveLeft(<strong class="jxr_keyword">int</strong> pos) {
<a class="jxr_linenumber" name="31" href="#31">31</a>          move(pos, pos - 1);
<a class="jxr_linenumber" name="32" href="#32">32</a>      }
<a class="jxr_linenumber" name="33" href="#33">33</a>  
<a class="jxr_linenumber" name="34" href="#34">34</a>      @Override
<a class="jxr_linenumber" name="35" href="#35">35</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> moveRight(<strong class="jxr_keyword">int</strong> pos) {
<a class="jxr_linenumber" name="36" href="#36">36</a>          move(pos, pos + 1);
<a class="jxr_linenumber" name="37" href="#37">37</a>      }
<a class="jxr_linenumber" name="38" href="#38">38</a>  
<a class="jxr_linenumber" name="39" href="#39">39</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> move(<strong class="jxr_keyword">int</strong> pos, <strong class="jxr_keyword">int</strong> newPos) {
<a class="jxr_linenumber" name="40" href="#40">40</a>          <strong class="jxr_keyword">if</strong> (newPos &gt;= 0 &amp;&amp; newPos &lt;= 8) {
<a class="jxr_linenumber" name="41" href="#41">41</a>              <strong class="jxr_keyword">if</strong> ((pos == 2 &amp;&amp; newPos == 3) || (pos == 5 &amp;&amp; newPos == 6)) {
<a class="jxr_linenumber" name="42" href="#42">42</a>                  <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="43" href="#43">43</a>              }
<a class="jxr_linenumber" name="44" href="#44">44</a>              <strong class="jxr_keyword">if</strong> ((pos == 3 &amp;&amp; newPos == 2) || (pos == 6 &amp;&amp; newPos == 5)) {
<a class="jxr_linenumber" name="45" href="#45">45</a>                  <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="46" href="#46">46</a>              }
<a class="jxr_linenumber" name="47" href="#47">47</a>              swap(pos, newPos);
<a class="jxr_linenumber" name="48" href="#48">48</a>          }
<a class="jxr_linenumber" name="49" href="#49">49</a>      }
<a class="jxr_linenumber" name="50" href="#50">50</a>  
<a class="jxr_linenumber" name="51" href="#51">51</a>      @Override
<a class="jxr_linenumber" name="52" href="#52">52</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">synchronized</strong> <strong class="jxr_keyword">boolean</strong> isGoalReached() {
<a class="jxr_linenumber" name="53" href="#53">53</a>          Integer[] goal = {1, 2, 3, 4, 5, 6, 7, 8, 0};
<a class="jxr_linenumber" name="54" href="#54">54</a>          <strong class="jxr_keyword">return</strong> Arrays.deepEquals(state, goal);
<a class="jxr_linenumber" name="55" href="#55">55</a>      }
<a class="jxr_linenumber" name="56" href="#56">56</a>  
<a class="jxr_linenumber" name="57" href="#57">57</a>      @Override
<a class="jxr_linenumber" name="58" href="#58">58</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../com/googlecode/npuzzle/logic/Command.html">Command</a> commandDiff(<a href="../../../../com/googlecode/npuzzle/logic/PuzzleState.html">PuzzleState</a> state) {
<a class="jxr_linenumber" name="59" href="#59">59</a>          <strong class="jxr_keyword">int</strong> cmd = <strong class="jxr_keyword">this</strong>.emptyBlock() - state.emptyBlock();
<a class="jxr_linenumber" name="60" href="#60">60</a>          <strong class="jxr_keyword">switch</strong> (cmd) {
<a class="jxr_linenumber" name="61" href="#61">61</a>              <strong class="jxr_keyword">case</strong> 3:
<a class="jxr_linenumber" name="62" href="#62">62</a>                  <strong class="jxr_keyword">return</strong> Command.DOWN;
<a class="jxr_linenumber" name="63" href="#63">63</a>              <strong class="jxr_keyword">case</strong> -3:
<a class="jxr_linenumber" name="64" href="#64">64</a>                  <strong class="jxr_keyword">return</strong> Command.UP;
<a class="jxr_linenumber" name="65" href="#65">65</a>              <strong class="jxr_keyword">case</strong> 1:
<a class="jxr_linenumber" name="66" href="#66">66</a>                  <strong class="jxr_keyword">return</strong> Command.RIGHT;
<a class="jxr_linenumber" name="67" href="#67">67</a>              <strong class="jxr_keyword">case</strong> -1:
<a class="jxr_linenumber" name="68" href="#68">68</a>                  <strong class="jxr_keyword">return</strong> Command.LEFT;
<a class="jxr_linenumber" name="69" href="#69">69</a>              <strong class="jxr_keyword">case</strong> 0:
<a class="jxr_linenumber" name="70" href="#70">70</a>                  <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="71" href="#71">71</a>              <strong class="jxr_keyword">default</strong>:
<a class="jxr_linenumber" name="72" href="#72">72</a>                  <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(<span class="jxr_string">"No command can be defined for this difference."</span>);
<a class="jxr_linenumber" name="73" href="#73">73</a>          }
<a class="jxr_linenumber" name="74" href="#74">74</a>      }
<a class="jxr_linenumber" name="75" href="#75">75</a>  
<a class="jxr_linenumber" name="76" href="#76">76</a>      @Override
<a class="jxr_linenumber" name="77" href="#77">77</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../com/googlecode/npuzzle/logic/PuzzleState.html">PuzzleState</a> copyState() {
<a class="jxr_linenumber" name="78" href="#78">78</a>          <a href="../../../../com/googlecode/npuzzle/logic/EigthPuzzleState.html">EigthPuzzleState</a> newState = <strong class="jxr_keyword">new</strong> <a href="../../../../com/googlecode/npuzzle/logic/EigthPuzzleState.html">EigthPuzzleState</a>();
<a class="jxr_linenumber" name="79" href="#79">79</a>          <strong class="jxr_keyword">synchronized</strong> (state) {
<a class="jxr_linenumber" name="80" href="#80">80</a>              System.arraycopy(state, 0, newState.state, 0, state.length);
<a class="jxr_linenumber" name="81" href="#81">81</a>              <strong class="jxr_keyword">return</strong> newState;
<a class="jxr_linenumber" name="82" href="#82">82</a>          }
<a class="jxr_linenumber" name="83" href="#83">83</a>      }
<a class="jxr_linenumber" name="84" href="#84">84</a>  }
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